... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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... Australia Telescope Compact Array . ... Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or Extremely Compact Dwarf Galaxies? ... We suggest that these objects are either super-massive star clusters (intra-cluster globular clusters or tidally stripped nuclei of dwarf galaxies) or a new type of low-luminosity compact elliptical dwarf (``M32-type'') galaxy. ... Keywords: galaxies: star clusters -- galaxies: dwarf -- galaxies: formation . ... Properties of the compact objects ...

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• Discovery Observations: The Fornax Spectroscopic Survey
• Summary
• Introduction

... Astrophysics Group . ... Pulsars . ... Stars ? ... The array was designed to detect compact radio sources such as these by virtue of the fact that they would scintillate (twinkle) when observed from the Earth through the interplanetary medium ? ... One of Antony Hewish?s research students, Jocelyn Bell, was set the task of operating the telescope and inspecting the daily charts for the kind deflections in the trace which occurred when a scintillating source passed over the array. ...

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• Astrophysics Group AMI
• Astrophysics Group RYLE
• Astrophysics Group General Interest

... astro-ph/0210408 . Открытие разрешенного остатка сверхновой в M31 с борта Chandra (The Discovery of a Spatially-Resolved Supernova Remnant in M31 with Chandra) . Authors: A.K.H. Kong, M.R. Garcia, F.A. Primini and S.S. Murray (CfA) . ... Author: Donald Lynden-Bell (The Observatories of the Carnegie Institution, Pasadena, USA, The Institute of Astronomy and Clare College, Cambridge, UK.) . ... обзор hep-ph/0210123 . ... Author: Renyue Cen (Princeton University Observatory) . ...

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... Next: Unsupervised Catalog Classification Up: Object Detection and Previous: Classification of Objects . ... Multi-resolution allows for image analysis in terms of different scales. ... This approach is used for the detection (and subsequent analysis) of globular cluster systems around elliptical galaxies, and for image characterization and object trawling in large image databases. ... The applicability of this approach to object detection in large image collections has been investigated. ...

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• Refining the Guide Star Catalog: Plate Evaluations
• Unsupervised Catalog Classification
• ADASS 2002 Conference Proceedings

. Cosmology . Very Early Universe . Cosmic Microwave Background Anisotropy . Dark Matter Models . Large Scale Structure . High Energy Astrophysics . Active Galactic Nuclei . Astrophysics of Compact Objects . Accretion Disks . Scientific Staff:

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... Science . ... Science Users Information > Science Activities > VLT/VLTI Science Verification > VIMOS . ... Observing with ESO Telescopes . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... VLT/VLTI Science Verification . ... VISTA Science Verification . APEX Science Verification . ... ESO Science Newsletter . ... A VIMOS-IFU Study of Early-Type Galaxies . ... NGC 1427 (03h42m19.4s -35d23m34s) . ... Program to be observed . ...

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• ESO - Central Massive Objects: The Stellar Nuclei - Black Hole Connection
• Discovery X-Ray Image of the Distant Cluster | ESO
• The globular cluster NGC 6388 observed by the European Southern Observatory |

Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . Stars . ... This dramatic image depicts Omega Centauri, one of 200 or so globular clusters orbiting our Milky Way galaxy. ... Swarms of tightly packed stars, numbering in the thousands to low millions, globular clusters are cosmic fossils, relics of the early times of our galaxy. Omega Centauri may actually be the core of a smaller galaxy ripped apart and assimilated by our own Milky Way in the distant past. ...

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• Other Galaxies | Astronotes
• The Mystery Object of M82 | Astronotes
• M55 globular cluster seen by ESO | Astronotes

... The department was founded in late sixties by Prof. D.Ya.Martynov, who for many years was also the director of Sternberg Astronomical Institute. At present time, the head of the department is Prof. A.M.Cherepashchuk, a pupil of D.Ya.Martynov and his successor as the director of SAI. Since Prof. Martynov, the scientific activity of the department was primarily related to binary stars. ... The department consists of 15 members most of which have Ph.D. in Astrophysics. ...

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... 3C294: Distant X Ray Galaxy Cluster . ... Astronomers now realize that a hallmark of these cosmic behemoths are gas clouds with temperatures of tens of millions of degrees that pervade the clusters and radiate strongly in x-rays. This Chandra Observatory image centered on a radio galaxy cataloged as 3C294 indeed reveals the telltale hot x-ray gas in an hourglass shaped region surrounding the dominant galaxy and shows the presence of a massive galaxy cluster in the distant universe . ...

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• Thousands of Coma Cluster Galaxies
• Астронет > Thousands of Coma Cluster Galaxies
• The Coma Cluster of Galaxies

NASA's James Webb Space Telescope: Age Dating of Clusters Age dating of globular star clusters has revealed them to be among the oldest objects known in the Milky Way. ... For a dozen star clusters, JWST will map the complete white dwarf cooling sequences of each system using a combination of red-optical and near-infrared imaging (e.g., F090W and F150W filters on NIRCam). ... A simulated JWST/NIRCam image of a star cluster observed at 0.9 microns How Blue Can JWST Go? ...

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• http://www.stsci.edu/ftp/meetings/galaxy-morphology/giraud.ps
• http://www.stsci.edu/jwst/science/sodrm/highlightClusters.pdf
• Andy Fruchter's Homepage

IFP gallery SCORPIO (since 2000). Here some data observed on the 6m telescope with IFP installed in the SCORPIO focal reducer are presented. ... Velocity field . Mkn 1157 was observed 1 Sep. 2002 in the Ha emission line. Texp =32x240 sec, seeing 1.5", IFP260. ... This galaxy was observed September, 23 2000 in the Ha emission line, Texp=32x120 sec, seeing 2.5", IFP260. ... PV Cep was observed at the 6m telescope in May, 25 2003 in the [SII] 6716A with IFP501, Texp=36x200 sec, seeing 1.0". ...

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• Search for distant radio galaxies in SAO
• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Magnetic stars -
• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Physics and

Search Site . ... Advanced Search? ... Main goal of our group is to study energy transformation mechanisms in extreme gravitational and magnetic fields of such objects as black holes, pulsars, white dwarfs and flaring stars. Currently, the Group staff is working on the following scientific topics: . Study of rapidly variable astrophysical objects with high temporal resolution . ... Maintained by Sergey Karpov љ-љPart ofљ Special Astrophysical Observatory љwebsite ...

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• Cluster Analysis
• LEDA data base
• "Structure" publications in 1998 year

... Tonight's Sky . ... Observing . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... The 109 objects in a March globular cluster marathon . ... In the March 2014 issue of Astronomy, I challenged readers with the question, How many globular clusters can you see in might night? Taking the Messier marathon as inspiration, I made a list of 109 globular clusters to track down in a single night in March. ... Get instant access to subscriber content on Astronomy.com! ...

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• New cluster is an ancient object | Astronomy.com
• Herschel Space Observatory is key to discovery of spectacular gravitational
• What's the difference between globular clusters and dwarf spheroidal galaxies?

... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . ... Technical reports . Projects . ... General interest seminars . ... IT Services . ... Information . Resources and catalogs . ... Historical highlights . Historical research . Historical archive . ... Projects and events . Online resources . ...

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• Accretion disks in luminous young stellar objects
• A new survey of X-ray clusters of galaxies with the Swift-X-ray Telescope
• Star formation

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• Discovery of an isolated dwarf spheroidal galaxy neighboring the Local Group
• Observatory structure
• articles_flera_en

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

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• SAI OCL Catalog Virtual Observatory
• SAI OCL Catalog Publications

... 2004 October 25 . The Perseus Cluster of Galaxies . ... Each of the fuzzy blobs in the above picture is a galaxy, together making up the Perseus Cluster , one of the closest clusters of galaxies . The cluster is seen through the foreground of faint stars in our own Milky Way Galaxy . ... The Perseus Cluster of Galaxies is part of the Pisces-Perseus supercluster of galaxies, which spans over 15 degrees and contains over 1000 galaxies. ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD Index - Galaxies: Clusters of Galaxies
• APOD: 2006 March 21 - The Coma Cluster of Galaxies
• APOD: September 28, 1999 - Mystery Object Explained

A Canadian and American team of Astronomers have used the 305-m wide Arecibo radio dish, the world's largest and most sensitive radio telescope, to uncover a dozen new super-fast-spinning pulsars. The team directed their search for these rare and exotic stars by pointing the Arecibo radio telescope towards massive star clusters, called Globular Clusters, orbiting our Milky Way galaxy. ... One of the most exotic residents in the Globular cluster system are the millisecond pulsars. ...

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• Solar System Studies at AO
• National Astronomy and Ionosphere Center (Arecibo Observatory)
• Pulsar Highlights - Dense Matter